lockscreen text and image color settings

Change-Id: Icfb127850768bfab8e8b59ea7f61037241d4a9bf

Conflicts:
	res/values/strings.xml
added color options for optimus 4x, currently disabled and hidden

Change-Id: Ifecd691aff675a491530396f2e362ece150ab18f

Conflicts:
	res/values/strings.xml
	src/com/android/settings/cyanogenmod/LockscreenInterface.java
enable colors for optimus4x and fixing it

Change-Id: I279e478c100e1df84be1c6d7a76f41085e3d4ed1